The problem is that the Best Buy Bucks only come attached to large fries, which is the menu item I am least likely to buy (I personally prefer buying a Big Mac without cheese and a medium coke. I then refill the coke once to get maximum value). So maybe other people buying the occassional large fry but who have no intention of driving to Best Buy to spend a single lousy BBB$1 might be willing to lend me theirs.